Cleaning brush
AssigneeBrushtech, Inc.
InventorArmen G. Gunjian
Life of this patent
Estimating the term…
Abstract
A cleaning brush has a handle, an elongated stem formed from a flexible coil spring, bristles at the end of the stem and a stiff member extending axially within the coil spring from the handle a distance partly the length of the stem to allow flexibility only in the area between the end of the stiff member and the bristle portion.
Claims4
A cleaning brush for cleaning the internal surface of a hollow workpiece comprising a handle, an elongated stem extending from the handle , and bristle means at the free end of the stem, characterized in that the stem is a one-piece, flexible, elongated coil spring having a uniform diameter, and an elongated rigid member is fixed to the handle and is fixed concentric with and rigidifies the coil spring stem and extends within the a length less than the length of the coil spring stem to a point spaced from the bristle means at the end of the stem, said rigid member limiting the flexibility of the coil spring to only the portion between the end of the stiff member and the bristle means whereby the elongated coil spring can serve to scrape the inner surface of a hollow work piece.
Dependencies are inferred from the claim text.